Question

Solve for a.
5a + 2 - 7-8 = 0
What is the root? If there is no root, choose none.

Answer 1

Answer:5

Step-by-step explanation: root5a+2 +7a-8 = 0

 squaring both side

5a+2=7a-8

8+2=7a-5a

10=2a

a=5

Answer 2

Answer:

$\sqrt{5a+2}-\sqrt{7a-8}=0$

Isolate a square root on the left-hand side

$\sqrt{5a+2} =\sqrt{7a-}8+0$

Eliminate the radical :-

$5a+2 = 7a-8$

Solve:-

$2a -10 = 0$

Add  10  to both sides, then Divide both sides by 2:-

$a = 5$

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